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Farklı Yöntemlerle Üretilen Co-Cr Alt Yapıların, Porselen ile Bağlantısının Değerlendirilmesi

GİRİŞ ve AMAÇ: Bu çalışmada döküm, CAD/CAM milleme ve lazer sinter yöntemleriyle hazırlanan Co-Cr metal alt yapı materyallerinin, farklı marka porselenler ile olan bağlanma dayanımlarının karşılaştırılması amaçlandı. YÖNTEM ve GEREÇLER: Toplam 108 adet Co-Cr metal örnek döküm, CAD/CAM Milleme ve Lazer Sinter teknikleriyle üretildi. Metal örnek grupları üçe ayrılarak üzerlerine üç farklı porselen markası (Noritake Ex3, Ceramco3, Vita VMK Master) uygulandı (n: 12). 5-550C de 5000 termal siklus uygulanan örneklere, Universal test cihazında (Shimadzu, Japan) makaslama bağlanma dayanımı testi uygulandı. Elde edilen kopma bağlanma dayanım değerleri, parametrik olmayan faktöryel (ANOVA) ve Bonferroni istatistiksel analizleri ile değerlendirildi. BULGULAR: Farklı metal üretim tekniklerinin bağlanma dayanımları arasındaki fark istatistiksel olarak anlamlı değildir (p=0,0576). Farklı porselenlerin metal örneklerle yapmış oldukları bağlanma dayanımları arasındaki fark ise anlamlı bulundu (p=0,004). En yüksek bağlanma dayanımını oluşturan porselenin Vita VMK Master (39,00 MPa) olduğu, Ceramco porselenin bağlanma dayanım değeri 35,58 MPa ve en düşük bağlanma dayanımı değeri ise Noritake porselende (33,17 MPa) olduğu bulundu. Metal gruplarının, porselen markaları ile etkileşimleri arasında anlamlı fark bulunmadı (p=0,713). TARTIŞMA ve SONUÇ: Bu in-vitro çalışmada kullanılan seramik markaları ile farklı tekniklerle üretilmiş alt yapılar arasında oluşan metal-seramik bağlantısının klinik kullanım için yeterli düzeyde olduğu görüldü.

Evaluation of Porcelain Bond Strengths of Co-Cr Substructures Produced by Different Methods

INTRODUCTION: The purpose of this study is; compare the bonding strengths of Co-Cr infrastructure materials prepared with casting,milling and laser sintering(LS) production methods and porcelains with three different brands. METHODS: 108 Co-Cr metal specimens were produced by casting,milling and LS techniques. The metal groups were divided 3 groups and three different porcelain brands (Noritake Ex3, Ceramco3, Vita VMK Master) were builded onto Co-Cr metal samples. 5000 thermal cycling at 5-55 °C applied to the samples and then shear bond strength test on a universal test machine (Shimadzu,Japan) applied. Ultimate shear bond strength (MPa) data were analyzed with non-parametric factorial (ANOVA) and Bonferroni statistical tests. RESULTS: No significant difference was found between the bond strengths of different metal production techniques(p=0,0576). The difference between the bond strengths of porcelain and metal groups was significant(p: 0,004). The highest bond strength value is found in Vita (median)(39,00 MPa), the bond strength of Ceramco is 35,58 MPa and the lowest value is found in Noritake 33,17 Mpa. There was no significant difference between the interaction of the metal and the porcelain groups(p=0,713). DISCUSSION AND CONCLUSION: The metal-ceramic bonding strength between the ceramic brands used in this in-vitro study and the infrastructures produced with different techniques was found sufficient for clinical use.

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Roberts HW, Berzins DW, Moore BK, Charlton DG. Metal-Ceramic alloys in dentistry: A Review. J Prosthodont, 2009, 18: 188-194.
Anusavice KJ, Shen C, Rawls HR. Phillips' science of dental materials. 12th Ed, Elsevier Health Sciences, USA, 2013, 367-395.
Mörmann WH. The origin of the Cerec method: a personal review of the first 5 years. Int J of Comput Dent, 2004; 7(1): 11-24.
Naylor WP, King AH. Introduction to metalceramic technology. 2nd Ed, Quintessence Publishing Company, USA, 2009, 1-13.
Ucar Y, Akova T, Akyil MS, Brantley WA. Internal fit evaluation of crowns prepared using a new dental crown fabrication technique: lasersintered Co-Cr crowns. J Prosthet Dent, 2009; 102(4): 253-9.
O'Brien WJ. Dental materials and their selection, 3rd Ed, Quintessence, USA, 2002, 200-224.
Drummon JL, Randolph RG, Jekkals VJ, Lenke JW. Shear testing of the porcelain metal bond. J Dent Res, 1984; 63: 1400-1401.
Baran GR. Selection criteria for base metal alloys for use with porcelains. Dent Clin North Am, 1985; 29: 779-787.
Derand T, Hero H. Bond strength of porcelain on cast vs. wrought titanium. Scand J Dent Res, 1992; 100: 184-188.
Yamamoto M. Metal-Ceramics: Principles and Methods of Makoto Yamamato, 1st Ed, Quintessence, Chicago, 1985, 106-203.
Hondrum SO. A review of the strength properties of dental ceramics. J Prosthet Dent, 1992; 67(6): 859-865.
McLean JW. Evolution of dental ceramics. J. Prosthet Dent, 2001; 85: 61-66.
Scolaro JM, Pereira JR, do Valle AL, Bonfante G, Pegoraro LF. Comparative study of ceramicto-metal bonding. Braz Dent J, 2007; 18(3): 240- 243.
Mabrurkar V, Habbu N, Hashmi SW, Musani S, Joshi N. In-vitro investigation to evaluate the flexural bond strengths of three commercially available ultra low fusing ceramic systems to Grade II Titanium. J Int Oral Health, JIOH, 2013; 5.5: 101.
Baran G, Boberick K, McCool J. Fatigue of restorative materials. Crit Rev Oral Biol Med, 2001; 12(4): 350-360.
Lohbauer U, von der Horst T, Frankenberger R, Krämer N, Petschelt A. Flexural fatigue behavior of resin composite dental restoratives. Dent Mater J, 2003; 19(5): 435-440.
Teixeira EC, Piascik JR, Stoner BR, Thompson JY. Dynamic fatigue behavior of dental porcelain modified by surface deposition of a YSZ thin film. J Prosthodont, 2008; 17(7): 527-531.
Kato H, Matsumura H, Atsuta M. Effect of etching and sandblasting on bond strength to sintered porcelain of unfilled resin. J Oral Rehabil, 2000; 27(2), 103-110.
Lang LA, Wang RF, Kang B, White SN. Validation of finite element analysis in dental ceramics research. J Prosthet Dent, 2001; 86(6): 650-654.
Lombardo GH, Nishioka RS, Souza RO, et al. Influence of surface treatment on the shear bond strength of ceramics fused to cobalt–chromium. J Prosthodont, 2010; 19(2): 103-11.
Hammad IA, Talic YF. Designs of bond strength tests for metal-ceramic complexes: review of the literature. J Prosthet Dent, 1996; 75(6): 602-8.
Uçar Y, Gürbüz, GA, Erken O. Diş hekimliğinde lazer sinterizasyon ve diğer tabakalı üretim yöntemleri. Turkiye Klinikleri J ProsthodontSpecial Topics, 2015; 1(1): 13-22.
Serra-Prat J, Cano-Batalla J, Cabratosa-Termes J, Figueras-Alvarez O. Adhesion of dental porcelain to cast, milled, and laser-sintered cobalt-chromium alloys: shear bond strength and sensitivity to thermocycling. J Prosthet Dent, 2014; 112(3): 600-605.
Stawarczyk B, Eichberger M, Hoffmann R, et al. A novel CAD/CAM base metal compared to conventional CoCrMo alloys: an in-vitro study of the long-term metal-ceramic bond strength. Oral Health Dent Manag, 2014; 13(2): 446-452.
Akova T, Ucar Y, Tukay A, Balkaya MC, Brantley WA. Comparison of the bond strength of laser-sintered and cast base metal dental alloys to porcelain. Dent Mater J, 2008; 24(10): 1400-1404.